Combination Refrigerator-Freezer with Dividing Air-Impermeable Air-to-Air Heat Exchanger

ABSTRACT

A combination refrigerator-freezer with dividing air-impermeable air-to-air heat exchanger is a system for cooling a refrigerator compartment and a freezer compartment utilizing a single cooling system and without mixing or exchanging air between the refrigerator compartment and the freezer compartment. Cold air is generated by the cooling system and circulated into the freezer compartment and into a freezer airflow compartment where the cold air cools an air-to-air heat exchanger. Warmer air circulating through a refrigerator airflow compartment positioned opposite to the freezer airflow compartment is cooled by the air-to-air heat exchanger and is in turn able to cool the refrigerator compartment. A control unit is utilized to control the temperatures within the refrigerator compartment and the cooling compartment and to ensure that the system is not active while defrosting is in progress. A first defroster and a second defroster are utilized to prevent key components from icing up.

The current application claims a priority to the U.S. Provisional Patentapplication serial number 62/166,455 filed on May 26, 2015.

FIELD OF THE INVENTION

The present invention relates generally to a combinationrefrigerator-freezer. More specifically, the present invention is acombination refrigerator-freezer with dividing air-impermeableair-to-air heat exchanger that prevents any mixture of air between therefrigerator and the freezer. The present invention utilizes a singlecooling system to cool the freezer while the refrigerator is cooled viathe heat exchanger.

BACKGROUND OF THE INVENTION

Conventional combination refrigerator-freezers utilize a single or dualcompressor system in order to cool the refrigerator compartment and thefreezer compartment. In a single compressor configuration, a singlecompressor and a single evaporator are utilized to cool both therefrigerator compartment and the freezer compartment. This is generallyaccomplished by cooling the freezer compartment to a desiredtemperature. A circulation fan directs cold air from the freezercompartment to the refrigerator compartment through a duct in betweenthe freezer compartment and the refrigerator compartment, thus coolingthe refrigerator compartment. A thermostat is utilized to adjust theamount of cold air that is transferred from the freezer compartment tothe refrigerator compartment. However, because air and moisture aremixed between the freezer compartment and the refrigerator compartment,temperature control can tend to be imprecise. Additionally, thesignificantly drier and lower temperature air from the freezercompartment causes food products in the refrigerator compartment tobecome dehydrated and rapidly lose freshness. Furthermore, because airfrom the freezer compartment is being utilized to cool the refrigeratorcompartment, there may be wide variations in temperature within thefreezer compartment and the refrigerator compartment themselves. This isdue to the fact that air traveling from the freezer compartment to therefrigerator compartment is unable to instantaneously cool the entirerefrigerator compartment, leaving areas of the refrigerator compartmentwarmer than others for periods of time. Within a dual compressor system,the freezer compartment and the refrigerator compartment are each cooledby its own compressor and evaporator independently. The use of a dualcompressor system allows for stable and consistent temperatures withinboth the freezer compartment and the refrigerator compartment. Theeffectiveness of a dual compressor system is offset by the fact that adual compressor system is more expensive, more complex, and requiresmore physical space to implement.

The present invention is a combination refrigerator-freezer withdividing air-impermeable air-to-air heat exchanger. The presentinvention enables the use of a cooling system consisting of a singlecompressor and a single evaporator in order to cool both a refrigeratorcompartment and a freezer compartment. The present invention enablescooling of both the refrigerator compartment and the freezer compartmentwithout mixing air between the two compartments. An air-to-air heatexchanger is positioned in between the refrigerator compartment and thefreezer compartment to prevent air from mixing between the twocompartments. The freezer compartment is cooled by the cooling systemand cold air within the freezer compartment is continuously circulatedthroughout the freezer compartment and directed along a first surface ofthe air-to-air heat exchanger. Air within the refrigerator compartmentis continuously circulated and directed along a second surface of theair-to-air heat exchanger. The air within the refrigerator compartmentmay thus be cooled as the air passes along the second surface of theair-to-air heat exchanger and is circulated throughout the refrigeratorcompartment. The present invention additionally includes defrost heatersthat prevent essential components of the present invention from icingup. Cooling operation is suspended while defrosting occurs in order toensure that the freezer compartment and the refrigerator compartment arenot undergoing cooling during defrosting operations.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagrammatic side view of an embodiment of the presentinvention.

FIG. 2 is a cross-sectional diagrammatic view of an embodiment of thepresent invention taken along line A-A of FIG. 1.

FIG. 3 is a diagrammatic overview depicting electronic connectionsbetween the control unit, the cooling system, the freezer circulationfan, the refrigerator circulation fan, and the cooling circulation fan.

FIG. 4 is a cross-sectional diagrammatic view of an embodiment of thepresent invention taken along line A-A of FIG. 1.

FIG. 5 is a diagrammatic overview depicting electronic connectionsbetween the control unit, the cooling system, the first defroster, andthe second defroster.

FIG. 6 is an internal diagrammatic view of an embodiment of the presentinvention.

FIG. 7 is a side view of an embodiment of the present invention.

FIG. 8 is a cross-sectional diagrammatic view of an embodiment of thepresent invention taken along line B-B of FIG. 6.

FIG. 9 is a front view of a residential embodiment of the presentinvention.

FIG. 10 is a cross-sectional view of the residential embodiment of thepresent invention taken along line C-C of FIG. 9.

FIG. 11 is a cross-sectional view of the residential embodiment of thepresent invention taken along line D-D of FIG. 9.

FIG. 12 is a front view of a commercial embodiment of the presentinvention.

FIG. 13 is a cross-sectional view of the commercial embodiment of thepresent invention taken along line E-E of FIG. 12.

FIG. 14 is a cross-sectional view of the commercial embodiment of thepresent invention taken along line F-F of FIG. 13.

DETAIL DESCRIPTIONS OF THE INVENTION

All illustrations of the drawings are for the purpose of describingselected versions of the present invention and are not intended to limitthe scope of the present invention.

The present invention is a combination refrigerator-freezer withdividing air-impermeable air-to-air heat exchanger. A diagrammaticoverview of the present invention is shown in FIGS. 1-3. The presentinvention comprises a refrigerator compartment 1, a freezer compartment2, a cooling compartment 3, a refrigerator airflow compartment 4, afreezer airflow compartment 5, an air-to-air heat exchanger 8, a coolingsystem 13, and a control unit 18. The present invention is able to coolboth the refrigerator compartment 1 and the freezer compartment 2 viathe single cooling system 13. No air is exchanged between therefrigerator compartment 1 and the freezer compartment 2, eliminatingdrastic temperature fluctuations within the refrigerator compartment 1.Additionally, no moisture is exchanged between the refrigeratorcompartment 1 and the freezer compartment 2, preventing food productswithin the refrigerator compartment 1 from being dehydrated and losingfreshness.

With continued reference to FIGS. 1-3, the freezer compartment 2 is thecompartment in which products such as perishable food items are cooledat a temperature below the freezing point of water. The refrigeratorcompartment 1 is the compartment in which products are cooled at atemperature above the freezing point of water. The cooling compartment 3houses some or all subcomponents of the cooling system 13 and providescold air to the freezer compartment 2. The cold air is produced by thecooling system 13 and is circulated through the freezer compartment 2.The cooling compartment 3 is adjacently connected to the freezercompartment 2, allowing the cold air to flow directly from the coolingcompartment 3 to the freezer compartment 2. Various subcomponents of thecooling system 13 may or may not be contained within the coolingcompartment 3. The freezer airflow compartment 5 serves as a conduitthrough which the cold air from the cooling compartment 3 is able topass after circulating through the freezer compartment 2. Similarly therefrigerator airflow compartment 4 serves as a conduit through which airfrom the refrigerator compartment 1 is able to pass after circulatingthrough the refrigerator compartment 1. The air-to-air heat exchanger 8is connected in between the refrigerator airflow compartment 4 and thefreezer airflow compartment 5. Additionally, the air-to-air heatexchanger 8 is in thermal contact with the refrigerator airflowcompartment 4 and the freezer airflow compartment 5. Because of this,the cold air passing through the freezer airflow compartment 5 is ableto cool the air-to-air heat exchanger 8, in turn cooling the warmer aircirculating through the refrigerator airflow compartment 4 and coolingthe refrigerator compartment 1. The air-to-air heat exchanger 8additionally prevents air from the freezer airflow compartment 5 and airfrom the refrigerator airflow compartment 4 from being mixed. Therefrigerator compartment 1 may thus be cooled without any air beingexchanged between the freezer compartment 2 and the refrigeratorcompartment 1. The specific arrangement of the refrigerator compartment1, the refrigerator airflow compartment 4, the freezer compartment 2,the freezer airflow compartment 5, and the cooling compartment 3 mayvary across embodiments of the present invention.

The control unit 18 is responsible for regulating the temperatureswithin the freezer compartment 2 and the refrigerator compartment 1. Thecontrol unit 18 is electronically connected to the cooling system 13 asshown in FIG. 3, enabling the control unit 18 to activate, deactivate,and otherwise control the cooling system 13 during operation of thepresent invention. The control unit 18 is able to disable the coolingsystem 13 during a defrost cycle in order to ensure that the coolingsystem 13 is not producing cold air while other areas of the presentinvention are being defrosted. The control unit 18 may include anelectronic display as well as input means such as buttons and knobs toallow the user to adjust the settings of the present invention.Furthermore, the control unit 18 may include additional components suchas temperature sensors to monitor the temperatures of various regions ofthe present invention.

Airflow within the present invention is depicted in FIG. 2. Therefrigerator airflow compartment 4, the freezer airflow compartment 5,and the cooling compartment 3 each comprise an inlet 6 and an outlet 7.The inlet 6 and the outlet 7 allow air to circulate through therefrigerator airflow compartment 4, the freezer airflow compartment 5,and the cooling compartment 3. However, as previously discussed, no airis exchanged between the refrigerator compartment 1 and the freezercompartment 2 nor between the refrigerator airflow compartment 4 and thefreezer airflow compartment 5. The cooling compartment 3 is in fluidcommunication with the freezer compartment 2 through the inlet 6 of thecooling compartment 3 and the outlet 7 of the cooling compartment 3.Cold air from within the cooling compartment 3 is thus able to flow intothe freezer compartment 2, circulate within the freezer compartment 2,and then reenter the cooling compartment 3. The freezer compartment 2 isin fluid communication with the freezer airflow compartment 5 throughthe inlet 6 of the freezer airflow compartment 5 and the outlet 7 of thefreezer airflow compartment 5. As such, air is circulated through thefreezer compartment 2 and the freezer airflow compartment 5 through theinlet 6 of the freezer airflow compartment 5 and the outlet 7 of thefreezer airflow compartment 5. The cold air passes from the freezercompartment 2 and into the freezer airflow compartment 5 where the coldair is able to cool the air-to-air heat exchanger 8.

With continued reference to FIG. 2, the refrigerator compartment 1 is influid communication with the refrigerator airflow compartment 4 throughthe inlet 6 of the refrigerator airflow compartment 4 and the outlet 7of the refrigerator airflow compartment 4. Warmer air (relative to thecold air produced by the cooling system 13) is circulated through therefrigerator compartment 1 and the refrigerator airflow compartment 4through the inlet 6 of the refrigerator airflow compartment 4 and theoutlet 7 of the refrigerator airflow compartment 4. The warmer air isable to pass from the refrigerator compartment 1 into the refrigeratorairflow compartment 4. The warmer air circulating through therefrigerator airflow compartment 4 is cooled as the air-to-air heatexchanger 8 is cooled by the cold air circulating through the freezerairflow compartment 5. Again, no air is exchanged between therefrigerator compartment 1 and the freezer compartment 2 nor between therefrigerator airflow compartment 4 and the freezer airflow compartment5.

The cooling system 13 comprises a compressor 14, an evaporator 15, acondenser 16, and a metering device 17. The compressor 14, theevaporator 15, the condenser 16, and the metering device 17 are themechanical components of the cooling system 13 that are utilized duringa conventional refrigeration cycle to cool the freezer compartment 2.The compressor 14 is in fluid communication with the condenser 16. Arefrigerant is compressed into a hot gaseous form by the compressor 14and is routed to the condenser 16. The condenser 16 removes heat fromthe hot compressed gas refrigerant and the hot compressed gasrefrigerant is condensed into a liquid. The condenser 16 is in fluidcommunication with the metering device 17. The liquid refrigerant isrouted from the condenser 16 to the metering device 17. The meteringdevice 17 serves to restrict the flow of the liquid refrigerant, causinga pressure drop and facilitating the evaporation of the liquidrefrigerant. The metering device 17 may be an expansion valve or acapillary tube. The metering device 17 is in fluid communication withthe evaporator 15, allowing the liquid refrigerant to be pressuredropped and routed to the evaporator 15. The liquid refrigerant isevaporated back into gas form in the evaporator 15. As the refrigerantis evaporated, the liquid absorbs heat from the surrounding area. Theevaporator 15 is in fluid communication with the compressor 14, enablingthe refrigerant to return to the compressor 14, completing therefrigeration cycle. The compressor 14, the evaporator 15, the condenser16, and the metering device 17 may be positioned within the coolingcompartment 3 as shown in FIG. 2. Alternatively, various subcomponentsof the cooling system 13, such as the compressor 14, may be positionedexternal to the refrigerator compartment 1, the freezer compartment 2,and the cooling compartment 3, as shown in FIG. 4. The coolingcompartment 3 may be compartmentalized in order to separately enclosethe subcomponents of the cooling system 13.

Again with reference to FIG. 2 and FIG. 3, the present invention furthercomprises a freezer circulation fan 21, a refrigerator circulation fan22, and a cooling circulation fan 23. The freezer circulation fan 21facilitates airflow from the freezer airflow compartment 5 and thefreezer compartment 2. The freezer circulation fan 21 is mounted intothe outlet 7 of the freezer airflow compartment 5, allowing air withinthe freezer airflow compartment 5 to exit back into the freezercompartment 2. Similar to the freezer circulation fan 21, therefrigerator circulation fan 22 generates airflow from the refrigeratorairflow compartment 4 to the refrigerator compartment 1. Therefrigerator circulation fan 22 is mounted into the outlet 7 of therefrigerator airflow compartment 4, allowing the warmer air that iscooled by the air-to-air heat exchanger 8 within the refrigeratorairflow compartment 4 to exit back into and cool the refrigeratorcompartment 1. The cooling circulation fan 23 forces cold air generatedby the cooling system 13 into the freezer compartment 2. The coolingcirculation fan 23 is mounted into the outlet 7 of the coolingcompartment 3, adjacent to the evaporator 15. As such, cold airgenerated during a conventional refrigeration cycle by the coolingsystem 13 is forced into the freezer compartment 2 by the coolingcirculation fan 23. The freezer circulation fan 21, the refrigeratorcirculation fan 22, and the cooling circulation fan 23 areelectronically connected to the control unit 18 as shown in FIG. 3,enabling the control unit 18 to activate and deactivate the freezercirculation fan 21, the refrigerator circulation fan 22, and the coolingcirculation fan 23 as needed. The control unit 18 is able to disable thefreezer circulation fan 21, the refrigerator circulation fan 22, and thecooling circulation fan 23 during a defrost cycle in order to halt aircirculation within the present invention while the present invention isunderdoing defrosting. However, during normal operation of the presentinvention, the freezer circulation fan 21, the refrigerator circulationfan 22, and the cooling circulation fan 23 are continuously run. Thisensures that air is constantly circulating through the refrigeratorcompartment 1, the refrigerator airflow compartment 4, the freezercompartment 2, the freezer airflow compartment 5, and the coolingcompartment 3.

Again with reference to FIG. 2, the present invention further comprisesa first defroster 24 and a second defroster 25 that are utilized duringa defrost cycle for the present invention. The defrost cycle is able toprevent the evaporator 15 and the air-to-air heat exchanger 8 frombecoming iced up during operation of the present invention. The firstdefroster 24 is positioned adjacent to the evaporator 15 while thesecond defroster 25 is positioned adjacent to the air-to-air heatexchanger 8. The first defroster 24 and the second defroster 25 are thusable to prevent ice from forming on the evaporator 15 and the air-to-airheat exchanger 8 and compromising the functionality of the presentinvention. The present invention is not limited with respect to thespecific type of defroster utilized for the first defroster 24 and thesecond defroster 25. For example, the first defroster 24 for theevaporator 15 may be a hot gas defrost system or an electrical heater.The second defroster 25 for the air-to-air heat exchanger 8 may be anelectrical defroster. Alternatively, an off cycle may be implementedduring defrosting in which the cooling system 13 is deactivated.

As shown in FIG. 5, the control unit 18 comprises a refrigerator controlunit 19 and a freezer control unit 20. The refrigerator control unit 19and the freezer control unit 20 regulate the temperature and the coolingof the refrigerator compartment 1 and the freezer compartment 2,respectively. The refrigerator control unit 19 is electronicallyconnected to the refrigerator circulation fan 22 and the freezercirculation fan 21, allowing the refrigerator control unit 19 toactivate the refrigerator circulation fan 22 and the freezer circulationfan 21 to enable cooling of the refrigerator compartment 1 or deactivatethe refrigerator circulation fan 22 and the freezer circulation fan 21to cease cooling during defrosting. Similarly, the freezer control unit20 is electronically connected to the cooling circulation fan 23,allowing the freezer control unit 20 to activate the cooling circulationfan 23 to enable cooling of the freezer compartment 2 or deactivate thecooling circulation fan 23 to cease cooling during defrosting. Therefrigerator control unit 19 is electronically connected to the freezercontrol unit 20 while the first defroster 24 and the second defroster 25are electronically connected to the freezer control unit 20 and therefrigerator control unit 19, respectively. The first defroster 24 andthe second defroster 25 are able to commence defrosting together, butmay complete defrosting separately. The refrigerator control unit 19 andthe freezer control unit 20 are interlocked in order to ensure thatcooling operations do not resume while defrosting is underway in anotherarea of the present invention. This is due to the fact that the timerequired for defrost cycles may vary for different areas of the presentinvention. The control unit 18 is thus able to prevent the coolingsystem 13, the refrigerator circulation fan 22, the freezer circulationfan 21, and the cooling circulation fan 23 from operating simultaneouslywith the first defroster 24 and the second defroster 25. Because therefrigerator control unit 19 and the freezer control unit 20 areinterlocked, the control unit 18 is able to ensure that all defrostcycles have completed before resuming operation of the cooling system13.

Again referring to FIG. 2, the present invention further comprises afirst insulation panel 26 and a second insulation panel 27. The firstinsulation panel 26 is connected in between the freezer compartment 2and the freezer airflow compartment 5. This reduces cooling of theair-to-air heat exchanger 8 when cold air is circulating through thefreezer compartment 2, thereby reducing the freezing of the air-to-airheat exchanger 8. The second insulation panel 27 is connected in betweenthe refrigerator compartment 1 and the refrigerator airflow compartment4. The second insulation panel 27 is thus able to minimize cooling ofthe air-to-air heat exchanger 8 from the refrigerator compartment 1,allowing the refrigerator compartment 1 to be cooled more effectively.

With reference to FIG. 6, the present invention further comprises atleast one runoff drain pipe 28 and a runoff drain pan 29. The at leastone runoff drain pipe 28 and the runoff drain pan 29 are utilized tocatch and remove runoff from the air-to-air heat exchanger 8 and theevaporator 15 during defrosting. The at least one runoff drain pipe 28is thus positioned adjacent to the air-to-air heat exchanger 8 and theevaporator 15, allowing runoff to enter the at least one runoff drainpipe 28. The runoff drain pan 29 is positioned adjacent to the at leastone runoff drain pipe 28 in order to collect runoff exiting the at leastone runoff drain pipe 28.

The air-to-air heat exchanger 8 may take a number of forms acrossvarious embodiments of the present invention. However, the presentinvention is not limited with respect to the specific design of theair-to-air heat exchanger 8. Most commonly, the air-to-air heatexchanger 8 comprises a plate 9 as shown in FIG. 2. A first surface 10of the plate 9 is in thermal contact with the freezer compartment 2 andis cooled by cold air circulating through the freezer airflowcompartment 5. A second surface 11 of the plate 9 is in thermal contactwith the refrigerator airflow compartment 4, allowing warmer aircirculating through the refrigerator airflow compartment 4 to be cooledby the air-to-air heat exchanger 8. In the embodiment of the presentinvention shown in FIG. 7 and FIG. 8, the air-to-air heat exchanger 8further comprises a plurality of fins 12. The plurality of fins 12 isable to improve the efficiency of the air-to-air heat exchanger 8 and isevenly distributed across the first surface 10 and the second surface11. The plurality of fins 12 is thus positioned within both the freezerairflow compartment 5 and the refrigerator airflow compartment 4.

Two example embodiments of the present invention are shown in FIGS.9-14. The example shown in FIGS. 9-11 is an embodiment of the presentinvention designed for use in residential applications. The exampleshown in FIGS. 12-14 is an embodiment of the present invention designedfor use in commercial applications.

The use of a single cooling system 13 in lieu of a dedicated system forboth the refrigerator compartment 1 and the freezer compartment 2provides a number of benefits to the present invention when compared toconventional refrigeration systems. Because only a single system is inuse, the present invention does not require more physical space as isrequired for a dual system. The single system offers a reduction in costas well. Additionally, because there is no air exchanged between thefreezer compartment 2 and the refrigerator compartment 1, both thefreezer compartment 2 and the refrigerator compartment 1 may be cooledevenly and be cooled more consistently without fluctuations intemperature. There is no moisture exchanged between the freezercompartment 2 and the refrigerator compartment 1 as well, preventingfood items within the present invention from being dehydrated and losingfreshness.

Although the present invention has been explained in relation to itspreferred embodiment, it is understood that many other possiblemodifications and variations can be made without departing from thespirit and scope of the present invention as hereinafter claimed.

What is claimed is:
 1. A combination refrigerator-freezer with dividingair-impermeable air-to-air heat exchanger comprises: a freezercompartment; a refrigerator compartment; a cooling compartment; afreezer airflow compartment; a refrigerator airflow compartment; anair-to-air heat exchanger; a cooling system; a control unit; therefrigerator airflow compartment, the freezer airflow compartment, andthe cooling compartment each comprise an inlet and an outlet; thecooling compartment being adjacently connected to the freezercompartment; the cooling compartment being in fluid communication withthe freezer compartment through the inlet of the cooling compartment andthe outlet of the cooling compartment; the freezer compartment being influid communication with the freezer airflow compartment through theinlet of the freezer airflow compartment and the outlet of the freezerairflow compartment, wherein air is circulated through the freezercompartment and the freezer airflow compartment through the inlet of thefreezer airflow compartment and the outlet of the freezer airflowcompartment; the air-to-air heat exchanger being connected in betweenthe refrigerator airflow compartment and the freezer airflowcompartment; the air-to-air heat exchanger being in thermal contact withthe refrigerator airflow compartment and the freezer airflowcompartment; the refrigerator compartment being in fluid communicationwith the refrigerator airflow compartment through the inlet of therefrigerator airflow compartment and the outlet of the refrigeratorairflow compartment, wherein air is circulated through the refrigeratorcompartment and the refrigerator airflow compartment through the inletof the refrigerator airflow compartment and the outlet of therefrigerator airflow compartment; and the control unit beingelectronically connected to the cooling system.
 2. The combinationrefrigerator-freezer with dividing air-impermeable air-to-air heatexchanger as claimed in claim 1 further comprises: a freezer circulationfan; a refrigerator circulation fan; a cooling circulation fan; thecooling system comprises a compressor, an evaporator, a condenser, and ametering device; the compressor being in fluid communication with thecondenser; the condenser being in fluid communication with the meteringdevice; the metering device being in fluid communication with theevaporator; the evaporator being in fluid communication with thecompressor; the freezer circulation fan being mounted into the outlet ofthe freezer airflow compartment; the refrigerator circulation fan beingmounted into the outlet of the refrigerator airflow compartment; thecooling circulation fan being mounted into the outlet of the coolingcompartment, adjacent to the evaporator; and the freezer circulationfan, the refrigerator circulation fan, and the cooling circulation fanbeing electronically connected to the control unit.
 3. The combinationrefrigerator-freezer with dividing air-impermeable air-to-air heatexchanger as claimed in claim 2 further comprises: the compressor, theevaporator, the condenser, and the metering device being positionedwithin the cooling compartment.
 4. The combination refrigerator-freezerwith dividing air-impermeable air-to-air heat exchanger as claimed inclaim 2 further comprises: the compressor being positioned external tothe refrigerator compartment, the freezer compartment, and the coolingcompartment.
 5. The combination refrigerator-freezer with dividingair-impermeable air-to-air heat exchanger as claimed in claim 1 furthercomprises: a first defroster; a second defroster; the first defrosterbeing positioned adjacent to an evaporator of the cooling system; andthe second defroster being positioned adjacent to the air-to-air heatexchanger.
 6. The combination refrigerator-freezer with dividingair-impermeable air-to-air heat exchanger as claimed in claim 1 furthercomprises: a first defroster ; a second defroster; the control unitcomprises a refrigerator control unit and a freezer control unit; therefrigerator control unit being electronically connected to the freezercontrol unit; the first defroster and the second defroster beingelectronically connected to the freezer control unit and therefrigerator control unit, respectively; the refrigerator control unitbeing electronically connected to a refrigerator circulation fan and afreezer circulation fan; and the freezer control unit beingelectronically connected to a cooling circulation fan.
 7. Thecombination refrigerator-freezer with dividing air-impermeableair-to-air heat exchanger as claimed in claim 1 further comprises: afirst insulation panel; a second insulation panel; the first insulationpanel being connected in between the freezer compartment and the freezerairflow compartment; and the second insulation panel being connected inbetween the refrigerator compartment and the refrigerator airflowcompartment.
 8. The combination refrigerator-freezer with dividingair-impermeable air-to-air heat exchanger as claimed in claim 1 furthercomprises: at least one runoff drain pipe; a runoff drain pan; the atleast one runoff drain pipe being positioned adjacent to the air-to-airheat exchanger and an evaporator of the cooling system; and the runoffdrain pan being positioned adjacent to the at least one drain pipe. 9.The combination refrigerator-freezer with dividing air-impermeableair-to-air heat exchanger as claimed in claim 1 further comprises: theair-to-air heat exchanger comprises a plate; a first surface of theplate being in thermal contact with the freezer airflow compartment; anda second surface of the plate being in thermal contact with therefrigerator airflow compartment.
 10. The combinationrefrigerator-freezer with dividing air impermeable air-to-air heatexchanger as claimed in claim 9 further comprises: the air-to-air heatexchanger further comprises a plurality of fins; and the plurality offins being evenly distributed across the first surface and the secondsurface.
 11. A combination refrigerator-freezer with dividing airimpermeable air-to-air heat exchanger comprises: a freezer compartment;a refrigerator compartment; a cooling compartment; a freezer airflowcompartment; a refrigerator airflow compartment; an air-to-air heatexchanger; a cooling system; a control unit; a first defroster ; asecond defroster; the refrigerator airflow compartment, the freezerairflow compartment, and the cooling compartment each comprise an inletand an outlet; the control unit comprises a refrigerator control unitand a freezer control unit; the cooling compartment being adjacentlyconnected to the freezer compartment; the cooling compartment being influid communication with the freezer compartment through the inlet ofthe cooling compartment and the outlet of the cooling compartment; thefreezer compartment being in fluid communication with the freezerairflow compartment through the inlet of the freezer airflow compartmentand the outlet of the freezer airflow compartment, wherein air iscirculated through the freezer compartment and the freezer airflowcompartment through the inlet of the freezer airflow compartment and theoutlet of the freezer airflow compartment; the air-to-air heat exchangerbeing connected in between the refrigerator airflow compartment and thefreezer airflow compartment; the air-to-air heat exchanger being inthermal contact with the refrigerator airflow compartment and thefreezer airflow compartment; the refrigerator compartment being in fluidcommunication with the refrigerator airflow compartment through theinlet of the refrigerator airflow compartment and the outlet of therefrigerator airflow compartment, wherein air is circulated through therefrigerator compartment and the refrigerator airflow compartmentthrough the inlet of the refrigerator airflow compartment and the outletof the refrigerator airflow compartment; the control unit beingelectronically connected to the cooling system; the refrigerator controlunit being electronically connected to the freezer control unit; thefirst defroster and the second defroster being electronically connectedto the freezer control unit and the refrigerator control unit,respectively; the refrigerator control unit being electronicallyconnected to a refrigerator circulation fan and a freezer circulationfan; and the freezer control unit being electronically connected to acooling circulation fan.
 12. The combination refrigerator-freezer withdividing air-impermeable air-to-air heat exchanger as claimed in claim11 further comprises: a freezer circulation fan; a refrigeratorcirculation fan; a cooling circulation fan; the cooling system comprisesa compressor, an evaporator, a condenser, and a metering device; thecompressor being in fluid communication with the condenser; thecondenser being in fluid communication with the metering device; themetering device being in fluid communication with the evaporator; theevaporator being in fluid communication with the compressor; the freezercirculation fan being mounted into the outlet of the freezer airflowcompartment; the refrigerator circulation fan being mounted into theoutlet of the refrigerator airflow compartment; the cooling circulationfan being mounted into the outlet of the cooling compartment, adjacentto the evaporator; and the freezer circulation fan, the refrigeratorcirculation fan, and the cooling circulation fan being electronicallyconnected to the control unit.
 13. The combination refrigerator-freezerwith dividing air-impermeable air-to-air heat exchanger as claimed inclaim 12 further comprises: the compressor, the evaporator, thecondenser, and the metering device being positioned within the coolingcompartment.
 14. The combination refrigerator-freezer with dividingair-impermeable air-to-air heat exchanger as claimed in claim 12 furthercomprises: the compressor being positioned external to the refrigeratorcompartment, the freezer compartment, and the cooling compartment. 15.The combination refrigerator-freezer with dividing air-impermeableair-to-air heat exchanger as claimed in claim 11 further comprises: afirst defroster; a second defroster; the first defroster beingpositioned adjacent to an evaporator of the cooling system; and thesecond defroster being positioned adjacent to the air-to-air heatexchanger.
 16. The combination refrigerator-freezer with dividingair-impermeable air-to-air heat exchanger as claimed in claim 11 furthercomprises: a first insulation panel; a second insulation panel; thefirst insulation panel being connected in between the freezercompartment and the freezer airflow compartment; and the secondinsulation panel being connected in between the refrigerator compartmentand the refrigerator airflow compartment.
 17. The combinationrefrigerator-freezer with dividing air-impermeable air-to-air heatexchanger as claimed in claim 11 further comprises: at least one runoffdrain pipe; a runoff drain pan; the at least one runoff drain pipe beingpositioned adjacent to the air-to-air heat exchanger and an evaporatorof the cooling system; and the runoff drain pan being positionedadjacent to the at least one drain pipe.
 18. The combinationrefrigerator-freezer with dividing air-impermeable air-to-air heatexchanger as claimed in claim 11 further comprises: the air-to-air heatexchanger comprises a plate; a first surface of the plate being inthermal contact with the freezer airflow compartment; and a secondsurface of the plate being in thermal contact with the refrigeratorairflow compartment.
 19. The combination refrigerator-freezer withdividing air impermeable air-to-air heat exchanger as claimed in claim18 further comprises: the air-to-air heat exchanger further comprises aplurality of fins; and the plurality of fins being evenly distributedacross the first surface and the second surface.